diff --git a/core/src/com/unciv/logic/civilization/CityStateFunctions.kt b/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
index 6f8917e1b3..efb8615a59 100644
--- a/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
+++ b/core/src/com/unciv/logic/civilization/CityStateFunctions.kt
@@ -49,7 +49,7 @@ class CityStateFunctions(val civInfo: CivilizationInfo) {
         // Mercantile bonus resources
         if (allPossibleBonuses.any { it.isOfType(UniqueType.CityStateUniqueLuxury) }
             || (fallback && cityStateType == CityStateType.Mercantile)) { // Fallback for badly defined Eras.json
-            civInfo.cityStateResource = allMercantileResources.random()
+            civInfo.cityStateResource = allMercantileResources.randomOrNull()
         }
 
         // Unique unit for militaristic city-states